I have a story about Macs gyro, I looked at that thing YEARS ago, I found out about it through a a guy at work that had a hunting buddy, that was selling a gyro/helicopter for a family estate, It was located in Ellenwood Ga, close to where I used to live, It was built in the early 1990's by a retired Eastern Airlines captain, He flew it a few times and then it sat and sat and sat, in a pole barn, out in the weather, He wanted $7000 at the time, He would not budge off the price, I told him good luck, and left. Then years later there it is in the Peachstate hangar!!
I think he should ditch the subaru and put a yamaha 3 cyl on it and raise the cabin some and get it closer to CLT, oh yeah, and remake every single part on it, at least He has patterns to copy!